we discussed the collagen proteins forund by Schweitzer in another thread about "bird evolution" These were actually analyzed by high res MS and the ratios of the badly preserved collagen proteins were best related to ostriches and chickens.

I never knew a T-Rex who was ABLE to suck.
Their teeth got in the way of their lips whenever thay tried it
and their arms were too short to operate a siphon,
but I do not believe that is the reason that thay became extinct.